Air-filter.



No. 840,530. I PATENTED-JAN. a, 1907. I. FFWALLAGE & W. L. KELLOGG. AIR FILTER.

APPLIOATIOLI FILED OUT-11, 1901.

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' part of this specification, the

perforated outer end .and shed UNITED STATES IRA F. WALLA CE,

PATENT oFFIon.

OF MINNEAPOLIS,- MINNESOTA, AND W ILLIAM LESTER KELLOGG, OF SIOUX CITY, IOWA.

AIR-FILTER.

Specification of Letters Patent.

Patented Jan. 8, 1907.

To all whom it may concern:

Be it known that we, IRA F. WALLACE, residing at Minneapolis, in the county of Hennepin and State of Minnesota, and WILLIAM LESTER KELLOGG, residing at Sioux City, in the county of Woodbury and State of Iowa, citizens of the United States, haveinvented certain new and useful Improvements in Air-Filters, of which the following is a specification.

()ur invention relates to improvements in attachments for air-pumps or other air inechanis' 1s where air is used for freeing the inflowing air from. dust and-other impurities.

0 this end our invention consists in th e features of construction and coznbination hereinafter particularly described and clain'ied.

In the accompanying drawing, forning figure illustrates a sectional view ofour invention shown applied to the airinlet port of the air-pu'np.

In the drawing, A represents the wall of the airpu'iip for red with an air-inlet port 2, in which is threaded a nozzle 3, having a 4. Inclosing the outer end of the nozzle 3 is a receptacle 5, preferably of sheet metal. The receptacle 5 is provided with. a suitable cover 6, said cover being for ed with perforations 7.

l/Vithin the receptacle is an open-work filling, such as hair 5, which has first been coated with a i-naterial, such as oil, which will shed moisture, but to which dust and other impurities will adhere. In use as the air passes to the air-pump through the receptacle 5 all the dust or other impurities contained-in the air will adhere to the coating upon the open-work filling, while at the sa 1e ti'ixe the filling, being nonabsorbent, will shed the moisture, thus causing the air to enter the air-chamber purified and dry. The open-work filling can be used indefinitely by removing it free the receptacle and re novin g the coating. It can then be rccoated and re- I placed in the receptacle. While I have shown a hair filling, it will be evident that screening or other open-Work filling can be coated with material which will collect dust moisture and used in lieu of the hair.

W'e claim l The combination with an air-pump, of a body of open-Work material arranged over I the inlet thereof, said material being non- I absorbent of water or oil and having an oily 1 'air but collect the dust ing non-absorbent of water or oil coating capable of being removed by washing, said coating serving to-shedthe water of the air but collect the dust and otner impurities to prevent the, same entering the pump.

2. The combination with the strainerinlet of an air-punp, of a receptacle carried thereby, ranged within said receptacle and covering said strainer-inlet, said material being nonabsorbent of water or oil and having an oily coating cap able of being removed by washing, said coating serving to shed the water of the and other i znpurities to prevent the sane entering the pump, and a perforated cover carried by said receptacle a body of open-work material ar-' for retaining the open-work material within the latter.

3. An air-filtering attachment for airpu'nps, comprising a receptacle designed to be applied to the air-inlet thereof, abody of ceptacle to cover said inlet, said t naterialbeing non-absorbent of water or oil and having an oily coating capable of being removed by washing, said coating serving to shed the water of the air but collect the dust and other impurities to prevent the same entering the pump, and a perforated cover carried '75 open-work material'arranged within said reby said receptacle for retaining the openwork material within the latter. v

4. An air-filtering attachment for airpuiw'xps, comprising a receptacle designed to be applied to the air-inlet thereof, a body of open-work..n-.aterial arranged within said receptacle to'covcr said inlet, said "nateriaLbeand having an oily coating capable of being reinoved by washing, said coating serving to shed the water of the air but collect the dust and other i" npurities to prevent the sane enterin the punp, and a perforated cover said receptacle for retaining the open-work material within the latter, said cover having a detachable connection with the receptacle to permit the open-work material being removed therefron for cleansing and recoating. In testi'nony whereof we affix our signa tures in presence of two witnesses.

IRA F. WALLACE. WILLIAM LESTER KELLOGG. Witnesses: I

H. S. JoHNsoN, EMILY EASTMAN.

carried by 

